package cn.edu.gcu.PraticalTraining.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import cn.edu.gcu.PraticalTraining.domain.User;

/**
 * 用户权限验证拦截器
 *
 */
public class AuthInterceptor implements HandlerInterceptor {
	private static Logger log =  LoggerFactory.getLogger(AuthInterceptor.class);

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		// TODO Auto-generated method stub
		HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		// TODO Auto-generated method stub
		HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
	}

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		log.info("auth interceptor");
		HttpSession httpSession = request.getSession();
		User user = (User)httpSession.getAttribute("user");
		if(user == null){
			response.sendRedirect("/login");
			return false;
		}else{
			return HandlerInterceptor.super.preHandle(request, response, handler);
		}
	}

}
